Web guide mechanism



NOV. 15, 1938. W C, NASH l 2,136,705

WEB GUIDE MECHANISM Filed Feb. 27, 1936 3 Sheetsheet 1 WEB'GUIDEMEGHANISM Filed Feb. 27, 193e 3 sheets-sneet 2 Nov. l5, 1938. Wl c. NASHWEB GUIDE MECHANISM Filed Feb. 27, 195,6 3 sheets-sheet 5 Patented Nov.15, 1938 UNITED STATES PATENT OFFICE 2,136,705 WEB GUIDE MECHANISMApplication February 27, 1936, Serial No. 66,079

2 Claims.

Thisv invention relates to improvements in a web guiding device andrefers specifically vto a device for guiding an endless traveling web insubstantially constant alignment whil-e said web is traveling in asubstantially vertical direction.

The object and advantages of my invention will be apparent from theaccompanying drawings and following detailed description.

In the drawings, Fig. 1 is a diagrammatic side elevational view of asubstantially vertically traveling web 'guided by my improved apparatus.

Fig. 2 is an enlarged elevational View of the guide roll actuatingmechanism.

Fig. 3 is a sectional View taken on line 3--3 of Fig. 2.

Fig. 4 is a sectional view taken on line A-l of Fig. 2.

Fig. 5 is a sectional view taken on line 5 5 of Fig. l.

Fig. 6 is a fragmentary detail elevational View illustratingparticularly the means for limiting the guide roll actuating mechanism.

`Referring in detail to the drawings, I indicates an endlessly travelingweb which is adapted to pass vover guide rolls, 2, 3, il, 5 and 5.

` In the paper making operation after the newly formed web hasbeenstripped from the forming wire, the same is passed forwardly throughone or more sets of presses and during passage through said presses theweak wet web is supported between two endlessly traveling felts orblankets. In Fig. l the web I `comprises one of the traveling felts orblankets. Of course, it is essential that the felt or blanket be causedto travel in substantially constant alignment. Therefore, in view of thefact that the felt during its back travel is carried over' a series ofguide rolls positioned above vor below the path of travel of the wetweb, said felt must be caused to travel in substantially verticaldirections.

My present invention is particularly applicable to the guiding of thesetraveling felts and a1- `though I do not wish to be limited to thisapplication of my invention, the operation thereof will be described asbeing carried out in conjunction with the guiding of a felt.

The guide roll 5 is mounted upon shaft 'l and a sprocket wheel 8 mayalso be mounted upon said shaft. A sprocket chain SI may travel aroundand be driven by the sprocket wheel 3, said chain in turn drivingsprocket wheel I5 which is mounted upon shaft I I journalled in theupper portion of standard I2 (Fig. 3). A standard, I2 may be mountedupon the upper portion of frame I3 and may be secured thereto by means(Cl. i4-241) of bolts I4 or the like. A bevel gear I5 is mounted uponthe end of shaft I I and is adapted to mesh with a cooperating bevelgear I5 mounted upon shaft I l. Shaft Il at its end may carry disc I8and a pin i9 is eccentrically positioned upon the face of said disc. Aconnecting rod 2i) is pivotally connected to pin I9 and is pivotallyconnected at its opposite end at 2| to the upper end of U-shaped member22. A link 23 is also connected at the pivot point 2| and is pivotallyanchored at its opposite end as atv 24 to the frame I3. 'Ih-e U-shapedmember 22 comprises spaced arms 25 and 26 which embrace or are disposedadjacent opposite faces of ratchet wheel 2l. The ratchetwheel 2'lisrigidlymounted upon shaft 28 which is journalled in vbearings 29 and 35carried by frame I3. The Wheel 2l carries an integral hub 3.! whichabuts bearings `29 and .35 at its opposite ends whereby lateral motionor motion ofthe wheel 21, or motion along the length of shaft 28 isprevented.

It can readily `be seen that -as web or blanket I travels over guiderolls .-2, 3, d, 5 and `E, the rotary motion of guide `roll 5 will drivesprocket wheel Il! which, in turn, imparts motions tothe disc I8 whichreciprocates connecting rod 2li. In View of the `fact that the U-shapedmember 22 is connected'to the anchoring link 23, the reciprocation ofconnecting rod 2i! imparts a substantially vertical motion to theU-shaped member 22. `Strictly speaking, the motion of pivot point 2l isalong an arc the radius of which is equal to the length yof `theanchoring link 23. However, due to the relative `length of the link 23vmal operation the U-shapedmember 22 oscil- Y lates upwardly anddownwardly, the arms 25 being substantially equally spaced from thewheel 21.

A bracket 32 is 4mounted upon frame I3 and is secured thereto` by meansof bolts 33 or the like. The end of the bracket 32 carries a bar 3l!which is provided with a slot 35 which traverses a substantial portionof the length of bar 34. A second bar 36 is adjustably secured to bar30s, the securing means comprising screw 3'! which can be rotated bymeans of lhand wheel 38, screw 31 being adapted to project through theslot 35 and anchor bar 35 at a desired position along the length of slot35. Bar 36 is `also provid-ed with a longitudinally extending slot 39. Ascrew 4U projects through slot 39 and is manipulated by hand wheel 4I tosecure the member 42 to the bar 36 at a desired position along thelength of the slot 39. The member 42 carries sleeve 43 which serves as abearing for pin 44. An arm 45 (Fig. 1) is secured at one of its ends toythe pin 44, said arm terminating at its opposite end in two spacedbifurcated projections 46. A feeler or palm 41 carries spaced lugs 48upon its rear surface, said lugs being secured to the bifurcated arms-46by means of pin 49. A coil spring 50 embraces pin 49 between thebifurcated arms 46 for a purpose to be hereinafter more fully described.

In utilizing my invention the bars 34 and 36 and the member 42 are sopositioned as to bring the face of palm 41 adjacent the desired path oftravel of the edge of theweb or felt I.

An arm I is carried at the opposite end of pin 44 and the extending endof said arm is pivotally connected to link 52. The opposite end of link52 is, in turn, pivotally connected to the extending end of an arm 53,said arm being keyed to shaft 54, which in turn is supportedby theextension 55 formed integral with the end of bar 34. A coil'spring (notshown) circumscribes shaft 54 and normally urges palm 41 toward the edgeof the web I. Shaft 54 carries at its opposite end arm 56 which, inturn, is pivotally connected to the member 26 comprising one of theU-shaped elements 22.

,As has been hereinbefore described, when the web or felt I is caused totravel, roll 5 is rotated and as a consequence sprocket chain 9 isdriven which, in turn, drives sprocket wheel I8. When sprocket wheel I0is so driven, the disc I8 is rotated and reciprocating motion isimparted to the U-shaped member 22. During normal operation of mydevice, that is, when the web or felt I is traveling in desired,constant alignment, the U-shaped member 22 merely reciprocatesvertically, both arms 25 and 26 being out of contact with the wheel 21and being substantially equally spaced from the respective oppositefaces of said wheel. Pawls 58 and 59 are ad- ,iustably carried at theends of respectively, arms 25 and 26. Each face of the wheel 21 isprovided with ratchet teeth 6U and 6I, said teeth being formed adjacentthe periphery of the wheel and being pitched in opposite directions.

It can readily be seen that during operation of my device lateralshifting or creepage of the web or felt I will cause palm 41 to movewhich, in turn, rotates pin 44. By means of the arm and linkagemechanism connecting pin 44 and the U-shaped member 22, said member willbe rocked to bring either pawl 58 or pawl 59 into contact with teeth 60or 6I, depending upon the direction of the shift of the web or felt I.Of course, simultaneously with the shifting of the member 22, saidmember is also reciprocated vertically and, consequently, either pawl 58or pawl 59 will engage the 'ratchet teeth 68 or 6I as the case may be,and move wheel 21 upwardly to downwardly as viewed in Fig. 2.

' The spring upon shaft 54 tends to keep palm 41 in contact with theedge of the web I if said webtends to move away from said palm. If theweb moves toward the palm at a greater rate than the web shiftingmechanism Canbperate, spring 50 permits palm 41 to flex and thereforeprevents injury to thek web or palm.

Shaft 28 upon which ratchet Wheel 21 is mounted carries at its endsprocket wheel 62 which upon being rotated by movement of wheel 21drives sprocket chain 63. Sprocket chain 63 is trained around sprocketwheel 64 which, in turn, is mounted upon shaft 65 (Fig. 5). Shaft 65 isjournalled in a Wall of housing 66 which may be mounted upon anysuitable support (not shown). A substantially vertically positionedscrew 61 may also be journalled in the upper and lower portions of thehousing 66, the upper end of said screw comprising an open-top bearing68 in which shaft 69 is journalled, said shaft carrying guide roll 6. Abevel gear is keyed to shaft 65 within housing 66 and meshes with acooperating bevel gear 1I which is threadedly mounted upon screw 61. Thearrangement is such that upon rotation of sprocket wheel 64, bevel gear1I is rotated and being threadedly engaged with screw 61, said screw ismoved upwardly or downwardly. It can readily be seen therefore that oneend of roll 6 is therefore moved upwardly or downwardly. Hence, when webor felt I creeps` laterally from a predetermined aligned position, palm41 actuates mechanism which causes one end of roll 6 to be movedupwardly or downwardly. The shaft 61 at the opposite end of roll 6 ispivoted in a swivel bearing (not shown) whereby roll 6 may be cantedfrom its normal horizontal position by upward or downward movement ofscrew 61. This action of roll 6 tends to shift the web or felt I back toits proper position of alignment.

A spur gear 12 is also mounted-upon shaft 28 and is rotated when wheel21 is moved by either pawl 58 or 59 and, consequently, spur gear 12 andsprocket wheel 62 also mounted upon shaft 28 move in unison. Therefore,whenever the end of roll 6 is moved upwardly or downwardly to return webor felt I to desired position, spur gear 12 is rotated. Spur gear 12meshes with a cooperating larger spur gear 13 mounted upon shaft 14which, in turn, is journalled in bearing carried by frame I3. A wormpinion 16 is also mounted upon shaft 14 and engages with worm wheel 11which is mounted upon one end of shaft 18. At the opposite end of shaft18 a disc 19 is positioned which is provided with a circumferentiallyarranged series of apertures 80. A screw 8I is positioned in one of theapertures 80, all of which are internally threaded so that they mayreceive the screw 8|. An arm 62 is pivotally connected to arm 26 of theU-shaped member 22, the opposite end of said arm being provided with aslot 83. The end of arm 82 having slot 83 is provided with a series ofspaced apertures 84 through which cotter-pins 85 may be positioned. Arm82 normally extends substantially horizontally from arm 26 and screw 8|may be positioned through slot 83.

When the web o r felt I shifts thereby causing ratchet Wheel 21 to berotated and in turn causing gear 12 to be rotated, said gear drives spurgear 13, worm pinion 16, worm wheel 11, shaft 18 and disc 19.Consequently screw 8I is moved within slot 83. To prevent abnormalshifting or raising or lowering of roll 6, cotter pins 85 may bepositioned through appropriate apertures 94 so as to limit the movementof screw 8I within slot 83. It can readily be seen that if disc 19 isrotated to too great an extent, pin 8I contacts one of the cotter pins85 and prevents motion of the U-shaped member in one direction or theother. The gearing arrangement is such that if the mechanism tends tomove roll 6 by engagement of pawl 58 with ratchet teeth 6D and thismovement becomes excessive, disc 19 will rotate in a clockwisedirection, as viewed in Fig. 2, and

`disengagement of pawl 58 from teeth 6U.

screw 8| will contact one of the cotter pins, namely the one to the leftof the screw, thereby moving the U-shaped member 22 andcausing If theroll 6 is moved excessively in the opposite direction, that is, whenpawl 59 repeatedly engages teeth 6l, disc 19 will rotate in acounterclockwise direction until screw 8| contacts cotter pin 85 andcauses disengagement of pawl 59 from teeth 6i by rocking the U-shapedmember in a counter-clockwise direction. By the provision of the coilspring U the operation of disc 19 which prevents excessive or extremelyprolonged engagementof either pawl 58 or 59 with the respective ratchetteeth 60 or 6l, palm 41 is prevented from injuring the web or felt Isince said spring will ex before injury to. the web or to the mechanismresults.

In the event that the web or felt I is to be cleaned or for any otherreason it is desired to render the device herein described inoperative,that is, to prevent upward or downward movement of the end of roll 6, ahairpin-shaped member 86 may be inserted in apertures 84 in arm 82adjacent each side 0I screw 8l. It can readily be seen that inasmuch asthe disc 19 is positively connected and responsive to movement of theratchet wheel 2, the U-shaped member 22 cannot be maintained in rockedposition for any substantial period of time. In other words, placingratchet wheel 21 into operation causes the U-shaped member 22 todisengage from ratchet wheel 2i and render the latter inoperative.

I claim as my invention:

1. A device for guiding a moving web which comprises in combination, aguide roll having its surface in contact with said web, a bearing forsupporting one end of said guide roll, means for moving said bearing,means for driving said bearing moving means, .a contact member movablein response to lateral movement of said web and an engaging member forconnecting said driving means to a source of mechanical power, aconnection between said Contact member and said engaging member forconnecting said driving means to said source of mechanical power inresponse to movement of said contact member, means synchronized withsaid driving means, and means connecting said synchronized means andsaid engaging member for limitingA movement of said engaging member.

2. A device for guiding a substantially vertical moving web whichcomprises in combination, a guide roll having its surface in contactwith said web, a bearing for supporting one end of said guide roll,means for moving said bearing in a substantially vertical direction,means for driving said bearing moving means, a Contact member movable inresponse to lateral movement of said web and an engaging member forconnecting said driving means to a source of mechanical power, aconnection between said contact member and said engaging member forconnecting said driving means to said source of mechanical power inresponse to movement oi said contact member, means synchronized withsaid driving means, and means connecting said synchronized means andsaid engaging member WILLIAM C. NASH.

